Barangay Nalsian Sur

Classified as a small barangay, Barangay Nalsian Sur is one of the administrative divisions of Malasiqui in Pangasinan, Ilocos Region, Philippines.

According to the 2020 Census of Population and Housing conducted by the Philippine Statistics Authority, Barangay Nalsian Sur had a population of 1,360. This made it the 51st largest of 73 barangays in Malasiqui by population, placing it in the middle tier of the municipality. Residents of Barangay Nalsian Sur accounted for approximately 0.95% of the total population of Malasiqui, which stood at 143,094 in the same census year.

Census comparisons between 2015 and 2020 show Barangay Nalsian Sur moving from 1,199 residents to 1,360 residents, an intercensal change of +13.4%. The trajectory indicates a growing community. The Philippine Statistics Authority classifies Barangay Nalsian Sur as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Malasiqui is a municipality comprising 73 barangays, and serves as the governing unit directly responsible for local services in Barangay Nalsian Sur, including public health, sanitation, peace and order, and civil registration. Within the wider province of Pangasinan, which contains 1,364 barangays across its component cities and municipalities, Barangay Nalsian Sur ranks 965th by 2020 population. Pangasinan is classified as a 1st by the Bureau of Local Government Finance, a category that reflects the province's annual regular income.

The barangay's legislative and executive affairs are handled by a Punong Barangay and the Sangguniang Barangay, elected nationwide during the Barangay and SK Elections. The next BSKE is scheduled for Monday, November 2, 2026, following the synchronized election schedule set by COMELEC Resolution No. 11191.